Rotary pump and the like



Mar. 3, 1925.

J. R. RICH ER ROTARY PUMP AND THE LIKE Filed Aug. 11, 1921 mm A? III/III,

Patented Mar. 3, 1925.

JOSEPH R. RICHER, O]? CHICAGO, ILLINOIS.

ROTARY PUMP AND THE LIKE.

Application filed August 11, 1921. Serial No. 491,326.

To all whom it may concern:

Be it known that I. JOSEPH R. RICHER, a citizen of the United States, residing at Chicago,

- Illinois, have invented certain new and useful Improvements in Rotary Pumps and the like, of which the following is a specification. I

The invention relates to rotary devices such, forexample, as rotary pumps, motors,

etc., embodying a cylinder element and. a

rotor element, the'latter being mounted-eowith respect to the former and equipped with pressure devices such as slidable vanes adapted operatively to engage the inner peripheral wall of the cylinder element. 4

The rincipal object of the invention is to rovide a device of the character stated wh1ch is highl eflicient in operation by reason of the e imination of a substantial amountof the friction which accompanies the operation of this class of devices as ordinarilyconstructed. v

More specifically stated, the object of the invention is to provide a device of this character in which the two main coact-ing operating elements are both rotatably mounted so that the driven element, through frictional contact withthe other element, causes it to rotate and thus substantially reduces the amount of friction therebetween without in any way-affecting the operation of the device.-

ce'ntrically vention is to provide a device of this character which is in the form of a pump of an eflicient and practical character. The objects of the invention thus generally stated, together withother and ancillary advantages, may be attained by the construction and arrangement illustrated in the accompanying drawings forming part hereof in which I have illustrated a pump to which is particularly adapted for use as a in the county of Cook and State of A further and general object of the inp tors, wherein the pressure device constitutes a piston actuated by the fluid. Moreover, in the interpretation of the appended claims, the invention is not to be understood as limited ,to the precise form, construction or arrangement of parts herein illustrated and described except as may be necessitated by the'state of the prior art.

In'the drawings, Figure 1 is a vertical central sectional view through a pump embodying my invention. Fig. 2 is an end elevational view of the same. Fig. 3 is a horizontal sectional view taken substantially in the plane of'line 3-3 of Fig. 1. Fig. 4 is a fragmentary detail sectional view illustrating a portion of the means for guiding 70 one of the operating elements in its rotation. Fig. 5 is a detached elevational view of the rotor element and its pressure device.

The device comprises primarily a'cylinder element 7, and a rotor element 8 mounted eccentrically with respect to the cylinder element. A pressure device 9,- in the form of one or more vanes, is adapted to coact with the cylinder and rotor elementin the operation of the device, in the well-known manner.

Herein the cylinder element 7 is rotatably mounted within an outer hous g or casing 10 comprising a-main or central portion 10 and end or side plates 10" and-10. The parts of the casing are secured together by means of bolts 11. At substantially equidistantly spaced oints within the casing, a lurality of ro lers 12, 12 and 12 engage with the outer periphery of the element 7.

Herein the rotor element is mounted so 7 that its periphery engages the inner periphery of the cylinder at approximately the uppermost point in the circumference of the cylinder element, and the rollers 12 and 12 are located upon opposite sides of the cylinder element and the roller 12 at the top side of the cylinder element. These rollers are mounted within recesses 13 formed in radial enlargements 140i the casing. Preferably the rollers 12-and 12 are mounted upon fixed pivots 15 and the roller 12" ismounted upon a 'movable pivot 16 and adapted toexert a yielding pressure upon the outer periphery of the cylinder element whereby to ho d it in operative conttwt with the rotor.

Referring to Fig. 4, the mounting for the shaft or pivot prises a pair 0 inwardly into the uppermost recesses 13 and having reduced inner end portions 17 entered through apertures near the opposite end of the pin 16. A pair of coiled expansion springs 18 encircle the studs and bear betweenthe. casing at the inner end of said recess on the one hand and the pin on the other hand. The roller12 thus exerts a yielding ressure upon the outer periphery of the cy inder element 7 and serves to hold said element in operative contact with the periphery of the rotor 8.

The rotor element 8 is journaled in the end p1ates10 and 10 as shown in Fig. 3. To this end the plate-10 is provided with a pin 16 for the roller 12 comlateral extension 19 providing a bearing 20 34 for receiving a journal 21 on one end of the rotor, and the plate 10 "is provided with a lateral extension 22 providing a bearing for a shaft 23 rigid with the opposite end of the rotor and adapted for connection with a source of motive power. Preferably the rotor is divided transversely substantially centrally thereof to provide two interfitting sections 8 and 8. These sections are maintained in relative rotative alinement by means of a pair of dowel pins 24, and are yieldingly held apart by means of a pair of coiled expansion springs 25. Preferably the outer end portions of each of the sections 8 and 8 are entered into sockets 26 formed in the inner sides of the end plates 10 and 10 of the casing. The rotor proper is thus 'ournaled in the side walls of the casing, and y reason of the peculiar construction and mounting thereof serves effectively to prevent the leakage of pressure fluid between it and'the sides of the casing.

Herein I employ two pressuremembers 9 which are in the form of vanes slidably mounted within the rotor 8 and yieldingly prising. in combination, a stationary casing,

held in sliding engagement with the inner periphery of the cylinder 7. Referring to Fig. 3, these vanes are preferably formed by means of a pair of interfittingplate members 27 having a spring 28 interposed therebetween so as toyieldablyforce the plates apart. The rotor sections 8 and 8" are provided with transverse slots or grooves. 29

and 30 in their inner faces, adapted to receive the opposite edges of said plates 27. The plates 27 are notched at their inner edges into stepped formation so as to coact in interfitting relation whileproviding be tween them a recess for the reception of the spring 28, and it will be-observed that each plate has a portion of substantial length ongaging in one of the grooves so as to resist effectively torsional strains.

The casing 10 has an inlet and an outlet arranged reslpectively on oppositesides of the rotor. erein 31 designates the inlet studs 17 projecting radially and 32 the outlet. These outlets are in the form of elongated slots (Fi 1) arranged between the cylinder element and the rotor 8, upon opposite sides of the rotor and preferably near its point of contact with the cylinder. Assuming then, the operation of the rotor in the direction of the arrow in Fig. 1, in the movement of the pressure member 9 adjacent the inlet 31 away from the in-- let, it causes an induction of fluid into the interior of the cylindenforcing before it to the outlet 32 the fluid previously drawn into the cylinder through said inlet. Herein both the inlet and the outlet are formed in the plate 10 of the casing and lateral extensions 33 are provided for the reception of inlet and outlet pipes when desired. Herein-I have illustrated such an outlet pipe -In the operation of the device, it will be apparent that the cylinder element 7, by reason of its frictional contact with the rotor 8,'rotates in the same direction as the rotor but of course at a somewhat slower speed. The friction thus produced between the two parts, however, is relatively slight, and the rotation of the cylinder has no effect upon the ability of the device to accomplish its intended function. Heretofore devices of this character have been wholly impractical in cases where high speed is required. With the present construction, however, the substantial elimination of friction and hence of excessive heat, renders the device well adapted for high speed purposes, as for example, as vacuum pumps, blowers, motors, etc. wherein an extremely high speed is required. Moreover, even when highspeed is not required, my invention is advantageous since the life of the device is materially prolonged by reason of the reduction of wear between the operating parts.

I claim as my invention:

1. A device of the class described coma cylinder rotatably mounted in said casing, a rotor journalled in said casing eocentrieal- 1y ofsaid cylinder, and a pressure member carried by the rotor and adapted operatively to engage the inner periphery of said cylinder, said cylinder being freely rotatable with respect to said rotor and adapted to yield relative thereto.

2. A device of the class described co1nprising, in combination, a stationary easing, a-cylinder rotatably mounted in said casing, a rotor journalled in said casing eccentrically of said cylinder, a pressure member carried by the rotor and adapted operatively to engage the inner periphery of said cylinder, said cylinder being freely rotatable with respect to said rotor, and means operable to exert a yielding pressure against tive contact with the rotor.

combination of a casing, a cylinder within.

' said casing, and a rotor mounted eccentrical- 'a plurality of ly within said cylinder, said cylinder being yicldable relative to said-rotor.

4. In a device of theclass described, comprising, in combination, a casing, a cylinder within the casing, a rotor mounted eccentrically within the cylinder, means rotatably guiding the cylinder for rotation independ ently of while supported by the rotor, said means being yieldable for relative displace ment of the rotor and cylinder, and a pressure member carried by one of said rotatable elements and operatively engaging with the other element.

5. In a device of theclass described, in combination, a cylinder element, a rotor element mounted eccentricallv of said cylinder element, a pressure member carried-by one of said elements'and operatively engaging the other, and means rotatably guiding said cylinder for rotation independently of while supported by said rotor element said means being yieldable for relative displacement of n the rotor and thecylinder.-

6. In a device of the class described, the

combination of a cylinder element, a rotor element mounted eccentrically of said' cy1-.

inder element, a pressure member-carried by one of said elements and operatively engaging the other, and means for guiding said cylinder for rotation independently of while supported by said rotor element, said means comprising a pair of rollers opera tively engaging the periphery of said cylinder upon substantially diametrically opposite sides thereof, and a third roller therebetween yieldinglv forcing said cylinder against said rotor.

I 7. In a device ofthe class described, the combination of a cylinder element, a rotor clement mounted eccentrically of said cyl inder element, a pressure member carried by one of said elements and operatively engaging the other, and means rotatably guiding said cylinder for rotation independently of said rotor element, said means comprising rollers operatively engaging the periphery of said cylinder, one of said rollers being adapted to exert a yielding pressure upon the cylinder.

8. In a'device of the class, described, the combination of a rotor, and a' cylinder within which said rotor is eccentrically disposed, said cylinder having an operative engagement with said rotor, the rotor being mount ed upon a fixedaxis and thecylinder upon a movable axis."

9. In a 'device of the class described, the

combination of a rotor, a cylinder within which said rotor is eccentrically disposed,

said cylinder being mounted upon a movable axis and having an operative engagement with said rotor so as to be supported thereby,

der,

upon a movable axis and adapted to rotate freely within said casing, a rotor mounted eccentrically of said cylinder on an axis 'fixed with respectto the casing and adapted to support the cylinder, and a pressure member carried by the rotor and operatively engaging the inner periphery of the cylinder, said casing having an inlet and an outlet communicating with the interior of the cylinder upon opposite sides of said rotor.

11. In a device of the class described, the combination of a casing, a cylinder, a rotor mounted upon a fixed axis in the casing and eccentrically of the. cylinder, and means tendingto hold said cylinder in operative contact with said rotor comprising a roller, a shaft carrying said roller, and spring casing tending to'move the roller inwardly.

12. In a device of the "class described, the

" means bearing between saidshaft and the a pair of studs carried by the casing and slidably engaging said shaft at their inner ends,'and springs between said casing and said shaft encircling said studs.

13. In a device of the class described, the

combination of a casing, a cylinder mounted in said casing with its axis movable in a transverse plane, and a rotor mounted upon a fixed axis within the cylinder concentrically thereof and adapted operatively to engage with the cylinder at a point approximately in said plane.

14. The combination of a casing. a cylinder, means for supporting the cylinder in the casing with its axis movable in a transverse plane, and a rotor mounted upon a fixed axis concentrically of the cylinder and adapted operatively to engage with the cylinder at a point approximately in said plane, said means being adapted to maintain the axis of said cylinder substantially in said plane.

15 The combination of a casing, a cylinmeans for supporting the cylinder in the casing with its axis movable in a transverse plane, and a rotor mounted upon a .fixed' axis concentrically of the cylinder and a plane extending transversely of the cylinder substantially diametrically thereof, and a rotor mounted upon a fixed axis eccentrically of the cylinder with its periphery operatively engaging the inner. periphery of the cylinder at a point approximately in said plane.

17. The combination of a cylinder mounted for movement with its axis traveling in a plane extending transversely of the cylinder substantially diametrically thereof, a rotor mounted upon a fixed axis eccentrically of the cylinder, and means tending at all times'to move said cylinder in said plane against the rotor.

18. The combination of a casing having a cylindrical chamber therein, a cylinder adapted to be inserted into said chamber and having an internal diameter less than the external diameter of the chamber, a rotor mounted upon a fixed axis eccentrically of said chamber, and means tending to move said cylinder in a plane extending diametrically of the chamber into contact with said rotor.

19. The combination of a casing havin a cylindrical chamber therein, a cylinder adapted to be inserted into said chamber and having an internal diameter less than the external diameter of the chamber, a rotor mounted upon a fixed axis and eccentrically of said chamber, and means tending to move said cylinder in a plane extending diametrically of the chamber into contact with said rotor, said means serving to divide the cham ber into inlet and outlet sections communicating with inlet and outlet ports respectively and said rotor having a pressure member slidably engaging-the inner peripheral wall of the cylinder;

20. The combination of a casing providing a chamber having an inlet and an outlet, a rotor mounted in said chamber, a cylinder also mounted in the chamber and having an internal diameter substantially less than the rotor, and means for effecting relative bodily movement in a fixed path between the rotor and the cylinder whereby to exert at all times a yielding engagement between the cylinder and rotor at a point in said'path.

In testimony whereof, I have hereunto set my hand.

JOSEPH R. RICHER. 

